*** I cannot guarantee this works for you too and all the risks & results you must take, otherwise, don't try this. I strongly suggest you clone your current disk to the backup by using SuperDuper or CCC. Then try this.
There are many comments on this, but the simple way from my experience:
1. It is caused from the current Airportitlwm.kext is not compatible with the latest macOS; 14.4.1
2. Someone suggest to disable this kext file, but more easier way is to use the latest kext though it's still at alpha version v2.3.0 (as of 7 April 2023)
3. Disabled of SecureBootModel, I updated my config.plist file in the EFI partition before updating the kext file, so I couldn't check if this is required or not.
4. I upgraded OpenCore to 0.9.9 the latest version as of today before trying this and all the Kext files, but there is no clear guidance that this is required. But, it's my behavior to upgrade OpenCore to the latest before updating macOS.
4. Updating to the latest stable of Airportitlwm.kext doesn't help, because the stable version is not compatible yet with Sonoma 14.4.1, so please download the alpha version from here:
https://github.com/OpenIntelWireless/itlwm/releases
5. Click "Assets", then you can see the Airportitlwm-Sonoma14.4-v2.3.0-DEBUG-alpha-e886ebb.zip file. Download it and replace it with the old kext file in your EFI partition. And, please keep in mind this file is at the alpha version and you have to try this at your live system, but to the test system.
6. Now install Sonoma 14.4.1 at Software Update suggests
7. It will reboot and I can see the start screen of the Sonoma update the same as on my Macbook Pro M notebook, and writing this article on macOS Sonoma 14.4.1 on Intel CPU.
